/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlinePartyInterface.h
Update an existing party with new configuration
true if task was started
bool UpdateParty ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & LocalUserId, const [FOnlinePartyId](API\Plugins\OnlineSubsystem\FOnlinePartyId) & PartyId, const [FPartyConfiguration](API\Plugins\OnlineSubsystem\Interfaces\FPartyConfiguration) & PartyConfig, bool bShouldRegenerateReservationKey, const [FOnUpdatePartyComplete](API\Plugins\OnlineSubsystem\Interfaces\FOnUpdatePartyComplete) & Delegate )